I had a compass attached to my DatamaxProPlus so when I exchanged it for the Cobra I had the dealer put one on. Haven't tried it yet, worked SAT and fished all day yesterday. The marlin have started to rise to lures again out here now so we trolled all day, but just ended up with mahi and runners. I use a compass heavily and even use a back up on my watch band, so I'll let you know what I think of the Cobra mount after this coming weekend when I get back in the water again. BTW, I lost a compass out of my DMPP mount so I used 3 drops of super glue to hold the last one in and it worked like a charm. Ever lost one out of the Cobra mount?